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#R422 Rammer w/ Honda GX100 Motor (MBW)

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#R422 Rammer w/ Honda GX100 Motor (MBW)
Special Instructions:


R422 Rammer Compactor with Honda GX100 Motor

The 422 Rammer is ideally suited for the compaction of granular, mixed and cohesive soils in confined areas. A mainstay in contractor and municipal fleets, the 422 offers highly a productive percussion rammer at less than 145 lbs. The contoured fuel tank provides the largest fuel capacity in its class and effectively baffles engine noise. Power is supplied by Honda engines.

  • Elevated bellows placement for trench applications
  • Patented polyethylene slide bearings provide minimal internal wear
  • 11” ductile cast iron tamping shoe
  • 4” and 6” trench shoes available for the 422


  • Shoe Size – 11 x 13 in (28 x 33 cm)
  • Operating Weight – 145 lb (66 kg)
  • Engine – Honda GX100 (98 cm3)
  • Travel Speed – Up to 55 ft/min (16 m/min)
  • Compaction Depth* – Up to 18 in.
  • * Clean sand, optimum moisture. MBW recommends that lifts not exceed 12″ of granular soil, 9″ of cohesive soil.
  • Percussion rate – Up to 750 blow/min
  • Fuel capacity – 4.6 qt. (4.3 l)
  • Engine – 3600 rpm
( ) Metric Measurements.
?Specifications subject to change without notice.
MBW works continuously to lower maintenance and extend life expectations of its rammers. We now introduce the industry's first percussion system completely free of high friction/heat/wear metal-on-metal reciprocating wear surfaces. The patent pending design features c-shaped, non-metallic, slide bearings between spring separator and spring box, ram shaft and spring box, and spring box and guide tube. Wear characteristics of the MBW bearings are several times better than traditional steel-on-cast iron designs. Lower operating friction/heat provide positive implications for engine, lubricant and bellows life. In the event percussion system lubricant is lost,

MBW percussion systems are designed to fail a single slide bearing, locking up the system and preventing damage to other bearing surfaces, as well as bearings and seals in the rammer's gearbox. Because MBW percussion systems generate less internal friction, rammers operate more efficiently, consume less fuel, and deliver more compaction force for the purpose intended. When replacement is eventually called for, MBW slide bearings are replaced at low cost, returning percussion systems to original specification.

MBW | RAMMERS - R422/R442/R482 (02:41)
MBW, Inc® Rammers are ideally suited for the compaction of granular, mixed and cohesive soils in confined areas. MADE IN THE USA Music composed by: Judgement Day - Terry Devine-King/ Andrew Barnabas/ Pauld Arnold
  • MBW | RAMMERS - R422/R442/R482
    MBW, Inc® Rammers are ideally suited for the compaction of gra...

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Endurance testing of the new design exceeded even MBW's expectations. As a result, MBW gas powered rammers now provide a 5 YEAR WARRANTY on percussion system slide bearings and bellows.

LIMITED WARRANTY. Some restrictions may apply.

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